Polar

Polar 是一款非线性阅读、记笔记和学习应用程序

Polar is a reader for PDF, EPUBs, and web pages, a note-taking tool that allows you to connect your thoughts, and a flashcard app to memorize information

Polar supports all standard reading features you would expect from a reader, like highlighting, annotating, commenting, or tagging (of files and notes). It also supports advanced features like manually or AI-generated flashcards from highlights, advanced reading tracking, area highlights, and others

Polar is also a non-linear note-taking tool that allows you to connect all your thoughts, whether they are notes, highlights, or annotations

Polar's flashcard features allows you to create flashcards easily from highlights or notes, use AI to automate the creation, and review flashcards using spaced repetition

Polar is supported across all major platforms

Polar offers all core features for free with a premium subscription for more storage and various advanced features. See our pricing for detail.